bj40 r/h headlight

[fjbj40]

Where does the passenger side headlight get its ground?

Does it get it from the dimmer relay some way? I was looking at the wiring diagram but can't make any sense of it

I have converted my system to 12 volts from 24 and this is the last bridge. The relay is 12 volts from the factory but I can only get the l/h headlight to power up. I have power at the r/h headlight when checking with a test lamp, it lights up on all three terminals.

high and low beam for the l/h side functions properly. I figured everything would function normally where it is 12 volts from the factory.

Thanks in advance,
Daryl

 

[bj40green]

ground

The color codes for both headlights are:
Red / Yellow stripe = HI (from relay)
Red / Green stripe = LOW (from relay)
White / black stripe = GROUND (into the harness)
That's for the original set up of course.
The fact that you measure 12V on all 3 pins means the ground is interupted. Run a wire from the headlight bulb (white / black stripe) directly to a metal part. That should do it.

Good luck,

Rudi

 

[fjbj40]

The oem r/h light does not have the white/black wire, it has the RY and RG and the RB wire which comes from the l/h battery +, know as he evil 12 volt tap!

That is what we got in Canada for the bj40 24 volt system so they could run 12 headlights.

Only the l/h lamp is wired the way you described and is factory as is the colors I gave up top.

The only ground wire is the WB on the l/h headlight.

Thanks,
Daryl

The color codes for both headlights are:
Red / Yellow stripe = HI (from relay)
Red / Green stripe = LOW (from relay)
White / black stripe = GROUND (into the harness)
That's for the original set up of course.
The fact that you measure 12V on all 3 pins means the ground is interupted. Run a wire from the headlight bulb (white / black stripe) directly to a metal part. That should do it.

Good luck,

Rudi

 

[bj40green]

If the RB wire is in the same position as the WB from the Left bulb then disconnect the RB from the bulb and run a new wire from that bulb to ground. In other words; copy the wiring from the LH light to the RH light. The RB went to the 12V tap but since you changed to 12V its now or connected to +12 or disconnected and hanging loose around the battery tray depends on what you did with the wiring.

Good luck again,

Rudi

 

[fjbj40]

OK, I will give that a try

Daryl

If the RB wire is in the same position as the WB from the Left bulb then disconnect the RB from the bulb and run a new wire from that bulb to ground. In other words; copy the wiring from the LH light to the RH light. The RB went to the 12V tap but since you changed to 12V its now or connected to +12 or disconnected and hanging loose around the battery tray depends on what you did with the wiring.

Good luck again,

Rudi

 

[bj40green]

Here is a wiring diagram

I made a pic to explain what I said before.



L1 and L2 is a double relay for the Low beam
H1 and H2 is a double relay for the High beam
But it can also be 2 single relays. Depends on how you wired it up.

Hope this helps.

Rudi

 

[fjbj40]

Thanks Rudi!

Because the sytem was 12 volt from the factory I figured I would not have to change anything. just hook her up and everything would function as before. I was looking at using the l/h plug to power a relay set-up like I did on my FJ62 but figured I would try and keep the factory wiring in place, just in case.

I think I will do the relay set-up as I put a set of Bosch H4 lamps in there.

Thanks again,
Daryl

 

[bizzjet]

wiring for headlight

Im in the same situation with my bj42. Iv try to ground the RG wire from the r/h side but the light are on without the dimmer light switch! The RG wire become your ground on the r/h. So i pass a new wire from the dimmer relay (RG)to the light and it work... but no highbeam!

The wiring diagram provide by eric leblanc it show a link fuse somewhere... not in the fuse block but in the engine area.
Any idea where it could be located?